Experience the cave like never before - in glowing, otherworldly color.
Step into near-darkness and watch mineral formations bloom in electric color. This 45-minute Black Light Tour in Dubuque turns ordinary cave features into photographic, scientific, and sensory highlights.
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Difficulty
moderate
Duration
45 minutes
Fitness Level
Able to stand and walk up and down stairs; comfortable with damp, cool conditions and narrow passages.
Wildlife
History
The cave has long been part of the region’s natural history and has offered guided tours on a local scale for decades.
Conservation
Guides limit light and movement to protect fragile formations; stay on the marked path and avoid touching mineral surfaces to reduce damage.
Experience the cave like never before - in glowing, otherworldly color.
Dress in layers
Cave temperatures are cool and damp—wear a lightweight waterproof jacket and a warm mid-layer.
Expect wet surfaces
Concrete stairs and passage floors can be slick; choose grippy, closed-toe shoes.
Follow photo rules
No video is allowed and guides will indicate permitted photo moments to protect the site.
Know accessibility limits
There are 32 concrete steps; wheelchairs and strollers do not fit—bring a cane or baby carrier if needed.
Waterproof jacket
Keeps you warm and dry in the cave’s cool, damp air.
Sturdy closed-toe shoes
Provides traction on concrete steps and slick passage floors.
Extra socks
Dry socks make the short, wet tour much more comfortable afterward.
Small daypack
Carry layers, bookings confirmation, and any small camera gear for use outside the cave.